7 kPa的數(shù)量級(jí)，在碰撞區(qū)附近出現(xiàn)1條塑性變形帶，且復(fù)管和基管上的剪切應(yīng)力相反，界面形態(tài)隨著爆炸波的傳播從直線變?yōu)椴睿@與試驗(yàn)中獲得的T2/316L雙金屬?gòu)?fù)合管的實(shí)際界面形態(tài)一致，說(shuō)明有限元模型能夠有效模擬雙金屬?gòu)?fù)合管爆炸焊接過(guò)程。數(shù)值模擬過(guò)程中邊緣動(dòng)態(tài)參數(shù)值均小于正常值，存在邊界效應(yīng)，增加復(fù)管和炸藥的長(zhǎng)度可以消除邊界效應(yīng)。;With copper/steel composite pipe as research object, two-dimensional numerical simulation of explosive welding process was conducted through AUTODYN finite element software with SPH and ALE methods. The dynamic welding process and boundary effect were analyzed, and the explosive welding tests of copper/steel composite pipe were conducted. Results indicate that under the action of detonation waves, the composite pipe obliquely collides with the base pipe. The pressure in the collision zone remains stable at the order of 107 kPa, and a plastic deformation band appears near the collision zone. The shear stresses have opposite directions on the base pipe and composite pipe, and the interface morphology changes from straight line to wavy shape with the propagation of explosion wave. This result is consistent with the actual interface morphology of the T2/316L bimetal composite pipe in experiments, indicating that this finite element model can effectively simulate the explosive welding process of bimetal composite pipe. During the numerical simulation process, the dynamic parameter values at the edges are all smaller than the normal values, leading to boundary effects. Increasing the length of composite pipe and explosive can eliminate the boundary effect."/>